The brightness is equal to a 40 W bulb or 40 candlepower or 6 #2 flat-wick lamps

Philippines

*Note: For lamps made prior to 1928 (Models 3-11), a Kone Kap Mantle Adaptor #N146A is required because Kone Kap mantles are no longer being produced. The adapter allows you to continue to use your lamp.